VANCOUVER, British Columbia — Shares of Capstone Copper Corp. fell $1.36, or 8.56%, to $14.53, as the mid-tier copper producer pulled back sharply alongside a broader retreat across mining and materials stocks amid a volatile week for global markets driven by surging oil prices and rising bond yields tied to escalating Middle East tensions.

Friday's decline comes despite Capstone Copper's continued strong operational and financial performance throughout 2026. The company reported second-quarter revenue of $739.65 million, comfortably beating the consensus analyst estimate of $709.62 million, according to Google Finance, reflecting continued strength in the company's underlying copper production and sales during the period.

Capstone Copper, founded in 1987 and headquartered in Vancouver, operates a portfolio of copper mines spanning the Americas, including the Mantoverde and Santo Domingo operations in Chile, the Pinto Valley mine in Arizona, and the Cozamin mine in Mexico. The company has provided full-year 2026 production guidance of between 200,000 and 230,000 tonnes of copper, according to Simply Wall St, reflecting largely stable output compared with the prior year as the company continues working through its broader portfolio of producing and development-stage assets.

The company experienced a temporary operational setback at its flagship Mantoverde mine in Chile in late August, when one of two ball mill electrical drive motors failed at the site. According to Simply Wall St, the on-site team........

© International Business Times